Find out how to turn rows into columns and back again.
Read an article explaining the PIVOT and UNPVIOT operators from Tim Hall. Then take a series of quizzes on these clauses from Kim Berg Hansen, the Dev Gym's very own SQL quizmaster.
Tim Hall*
69 Minutes
Intermediate to Advanced
*About Tim Hall
Tim Hall is an Oracle DBA/Developer and well known Oracle blogger at https://oracle-base.com. If that isn't enough, he's written two books and over 900 articles, is an Oracle ACE Director, Oracle Groundbreaker Ambassador, OakTable member, and has presented at numerous user groups and conferences worldwide.
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